Guard gear fit with headless and Blender regression checks

The Python fit test now caps the glasses at 0.70x head width and requires a
positive bag clearance on both the coat and dress. The Godot character suite
loads head/back gear on six roles and checks attach parents, head width and
brow bounds, and that back gear reaches beyond the 0.26 m body silhouette.
Rebuilt and re-baked all 18 gear assets; no-op GLB export churn was reverted.
Headless 229/229, Python 87/87.

tools/test_blender_assets.py

@@ -53,7 +53,8 @@ class BuiltAssetTests(unittest.TestCase):
         self.assertAlmostEqual(coat["reference"]["clothing_radius"], 0.225, places=3)
         sunglasses = next(row for row in coat["gear"] if row["name"] == "sunglasses")
         self.assertEqual(sunglasses["attach"], "head")
-        self.assertLess(sunglasses["width"], coat["reference"]["head_width"])
+        self.assertLessEqual(sunglasses["width"],
+                             0.70 * coat["reference"]["head_width"])
         bag = next(row for row in coat["gear"] if row["name"] == "shoulder_bag")
         self.assertEqual(bag["attach"], "back")
         self.assertGreaterEqual(bag["x_extent"], 0.2)
@@ -64,7 +65,10 @@ class BuiltAssetTests(unittest.TestCase):
                 self.assertEqual(len(row["min"]), 3)
                 self.assertEqual(len(row["max"]), 3)
         self.assertIn("npc_dress", report)
-        self.assertAlmostEqual(report["npc_dress"]["reference"]["clothing_radius"], 0.26, places=3)
+        dress = report["npc_dress"]
+        self.assertAlmostEqual(dress["reference"]["clothing_radius"], 0.26, places=3)
+        dress_bag = next(row for row in dress["gear"] if row["name"] == "shoulder_bag")
+        self.assertGreater(dress_bag["x_clearance"], 0)
 
     def test_manifest_covers_catalogue(self):
         manifest = json.loads(ba.MANIFEST.read_text(encoding="utf-8"))